
CoA hydrolysis was studied by a homogenous phosphoprotein phosphatase (EC 3.1 3.16) preparation from bovine spleen nuclei at pH 5.8. Phosphoprotein phosphatase catalyzed hydrolysis of the CoA 3'-phosphoester bond to form dephospho-CoA and Pi. The Km value for phosphoprotein phosphatase with CoA as substrate was 3.7 mM, the specific activity - 0.26 mmol Pi.min-1.mg-1. Phosphoprotein phosphatase did not essentially catalyze the calcium pantothenate hydrolysis (not more than 2% as compared with the CoA hydrolysis rate).
Kinetics, Hydrolysis, Phosphoprotein Phosphatases, Animals, Cattle, Coenzyme A, Chromatography, High Pressure Liquid, Spleen
Kinetics, Hydrolysis, Phosphoprotein Phosphatases, Animals, Cattle, Coenzyme A, Chromatography, High Pressure Liquid, Spleen
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